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Display device including a data selector circuit

a technology of selector circuit and display device, which is applied in the field of display device, can solve problems such as noise generation in the display panel, and achieve the effect of suppressing voltage variations and suppressing noise in the panel surfa

Active Publication Date: 2012-10-04
JAPAN DISPLAY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0021]In view of the above problems, one object of one or more embodiments of the present invention is to provide a display device which can suppress voltage variations of a common electrode due to negative writing and positive writing of a data signal and negative voltage precharge and positive voltage precharge, and as a result so as to suppress generating noise in a panel surface.

Problems solved by technology

Therefore, for example, when performing driving by reversing polarities of written voltages with respect to the reference voltage for plural lines, a potential of the common electrode may be varied, and noise may be generated in the display panel, because speeds of rising of the output signals are different.

Method used

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  • Display device including a data selector circuit
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  • Display device including a data selector circuit

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first embodiment

[0050]FIG. 1 is a diagram illustrating an outline of the display device according to the first embodiment of the present invention. As shown in FIG. 1, for example, a display device 100 includes a TFT substrate 102 provided with TFTs (not shown) and the like, and a filter substrate 101 which is opposite to the TFT substrate 102 and is provided with color filters (not shown). In addition, the display device 100 includes a liquid crystal material (not shown), which is sealed in a region interposed between the TFT substrate 102 and the filter substrate 101, and a backlight 103, which is located so as to come into contact with an opposite side of the filter substrate 101 side of the TFT substrate 102.

[0051]FIG. 2 is a diagram illustrating an outline of the configuration of the display device of one or more embodiments of the present invention. As shown in FIG. 2, the display device 100 includes a display region 201, gate circuits 202, a data selector circuit 203, and a driver 204.

[0052]...

second embodiment

[0085]Next, a second embodiment of the present invention will be described. The second embodiment is mainly different from the first embodiment in that polarities are reversed for each data line when precharge and writing are performed in the data selector circuit 203. In addition, in the following, description of the same configuration as in the first embodiment will be omitted.

[0086]FIG. 8 is a diagram illustrating an example of the data selector circuit according to the second embodiment. As shown in FIG. 8, similarly to the first embodiment, the data selector circuit 203 includes input terminals 5a and 5b to which data signals are input from the driver 204, plural time division switches SW1 to SW6, and plural timing adjustment switches TSW1 to TSW6. Output sides of plural time division switches SW1 to SW6 and plural timing adjustment switches TSW1 to TSW6 are respectively connected to the data lines D1 to D6 (corresponding to the data lines 302). In addition, although FIG. 8 sho...

third embodiment

[0092]Next, a third embodiment of the present invention will be described. The third embodiment is mainly different from the first embodiment in that each of the input terminals 5a and 5b, to which a data signal is input from the driver 204, is divided into three, the data signal is input to corresponding time division switches SW1 to SW6, and polarities are reversed for each of the data lines D1 to D6 when precharge voltages and data signals are written, in a configuration of the data selector circuit 203. In addition, in the following, description of the same configuration as in the first embodiment will be omitted.

[0093]FIG. 9 is a diagram illustrating an example of the data selector circuit according to the third embodiment. In the present embodiment, similarly to the first embodiment, the data selector circuit 203 includes input terminals 5a and 5b to which data signals are input from the driver 204, plural time division switches SW1 to SW6, and plural timing adjustment switche...

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Abstract

A display device includes a plurality of gate lines, a plurality of data lines, a gate circuit, a driver, and a data selector circuit that includes a plurality of switch groups each of which has a time division switch and a timing adjustment switch that are connected in parallel. The data selector circuit outputs output signals from the driver, which have different polarities every one or more data lines of the plurality of data lines, to the respective data lines. Each of the time division switches and the timing adjustment switches is an NMOS transistor. The driver turns on the timing adjustment switches connected to the data lines to which positive output signals are output from the driver, earlier than the time division switches connected to the data lines to which negative output signals are output from the driver, by a predetermined period.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]The present application claims priority from Japanese Application JP2011-075065, filed on Mar. 30, 2011, the content to which is hereby incorporated by reference into this application.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a display device, and particularly to a display device having a data selector circuit including an NMOS transistor.[0004]2. Description of the Related Art[0005]In the related art, in the liquid crystal display, there is known a driving method of reversing polarities of written voltages with respect to a reference voltage for any given plural lines. For example, in a case of performing dot inversion every two lines, polarities of written voltages are reversed with respect to the reference voltage for a certain data line every two horizontal periods. Also, there is known a so-called data selector circuit for inputting data signals, which correspond to grayscale valu...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G09G5/10
CPCG09G3/3688G09G2310/0248G09G2320/0233G09G2310/08G09G2310/0297
Inventor KOMATSU, HIROAKIMAKI, MASAHIROABE, HIROYUKI
Owner JAPAN DISPLAY INC
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